Pantograph gas circuit and pantograph with undervoltage protection function

Abstract

The invention provides a pantograph gas channel with an under-pressure protection function and a pantograph. The pantograph gas channel with the under-pressure protection function comprises a gas channel control part and a pantograph lifting driving part, the pantograph gas channel is characterized by further comprising a gas channel protection module, wherein the gas channel protection module isused for cutting off a gas channel and discharging compressed air in the gas channel, one end of the gas channel protection module is connected with the gas channel control part, and the other end ofthe gas channel protection module is connected with the pantograph lifting driving part. Compared with the related art, the pantograph gas channel with the under-pressure protection function has the functions of filtering and throttling the compressed air and adjusting the pressure of the compressed air, and if the pantograph lifting air pressure is abnormal, the pantograph gas channel is cut offor the pantograph is subjected to exhaust for pantograph lowering.

Description

technical field [0001] The invention relates to the technical field of rail vehicle equipment, in particular to a pantograph gas circuit and a pantograph with an undervoltage protection function. Background technique [0002] The rail transit locomotive is the main artery of national transportation. The safe and reliable operation of the rail transit vehicle is related to the normal operation of the social order. The pantograph is one of the key supporting technologies for the rolling stock and plays a very critical role in the reliable use of the rolling stock. [0003] The existing pneumatic pantograph relies on vehicle compressed air to control the lifting and lowering of the pantograph, and the vehicle air supply pipeline supplies compressed air to the pantograph, so that the air bag expands under the action of compressed air, and the lever mechanism of the traction pantograph moves to drive the pantograph. The pantograph realizes the action of raising the bow. The air ...

AI Technical Summary

Problems solved by technology

[0005] The precision pressure regulating valve has the following defects: when the vehicle input wind pressure value A is greater than the set wind pressure value B, the precision pressure regulating valve can be set to the set rated wind pressure value B, and the pantograph is raised normally , the bow contact pressure is equal to the rated contact pressure F1

[0006] The air-controlled quick exhaust valve has the following defects: after the vehicle supplies compressed air to the pantograph, the air path of the pantograph is filled with air, the air bag is inflated, and the pantograph is raised

Therefore, it is not possible to lower the bow when the wind pressure of the air bag is insufficient and the slide plate does not leak air.

That is to say, the air-controlled quick-exhaust valve cannot perform protective exhausting and lowering the bow when the air bag leaks and the slide plate does not leak air. abnormal contact

[0007] Insufficient contact pressure due to pantograph raising when undervoltage or insufficient contact pressure due to air leakage after raising the bow will cause abnormal contact and virtual connection between the slide plate and catenary wire, and the load on the pantograph and catenary wire will The heat generated by the flow is too large, causing the accident of burning the network cable

[0008] The pantograph of the existing pneumatic lifting bow cannot solve two problems: 1) The input air pressure of the vehicle is not enough (less than the rated wind pressure value), so that the contact force between the pantograph and the network cable is insufficient after the pantograph is lifted, and the pantograph and catenary are in a virtual connection Fault state; 2) The wind pressure of the pantograph of the pneumatic hoist vehicle is sufficient, greater than or equal to the rated wind pressure value of the hoist, and the pantograph is raised normally, but the pantograph itself leaks air, which makes the pantograph pipeline The wind pressure value drops, and the wind pressure of the air bag is lower than the rated bow wind pressure value, so that the contact force between the pantograph and the network cable is insufficient after the pantograph is raised, and the pantograph and net are in a fault state of virtual connection

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